Hi, CrystalLuna.
Thank you for visiting Apple Support Communities.
It would need a little clarification on this issue to provide a better answer. However, if your device will not turn on or is unresponsive, take a look at the troubleshooting steps in the article below.
If your iPhone, iPad, or iPod touch doesn't respond or doesn't turn on
If your device will power on but the display is blank, Screen Curtain may be enabled. Take a look at the steps in the article below to disable this feature.
Turn the screen curtain on or off. Triple-tap with three fingers. When the screen curtain is on, the screen contents are active even though the display is turned off.
Use iPhone with VoiceOver
-Jason H.